DMSetNearNullSpaceConstructor

Provide a callback function which constructs the near-nullspace for a given field, defined with DMAddField()

Synopsis

#include "petscdm.h"          
#include "petscdmlabel.h"     
#include "petscds.h"     
PetscErrorCode DMSetNearNullSpaceConstructor(DM dm, PetscInt field, PetscErrorCode (*nullsp)(DM dm, PetscInt origField, PetscInt field, MatNullSpace *nullSpace))

Logically Collective; No Fortran Support

Input Parameters

• dm - The DM

• field - The field number for the nullspace

• nullsp - A callback to create the near-nullspace

Calling sequence of nullsp

• dm - The present DM

• origField - The field number given above, in the original DM

• field - The field number in dm

• nullSpace - The nullspace for the given field

See Also

DM Basics, DM, DMAddField(), DMGetNearNullSpaceConstructor(), DMSetNullSpaceConstructor(), DMGetNullSpaceConstructor(), DMCreateSubDM(), DMCreateSuperDM(), MatNullSpace

Level

intermediate

Location

src/dm/interface/dm.c

Examples

src/ts/tutorials/ex53.c
src/snes/tutorials/ex17.c

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